package handler

import (
	"encoding/json"
	"github.com/gin-gonic/gin"
	"novel-hub/cache"
	"novel-hub/model"
	pkg5 "novel-hub/pkg"
	"strconv"
	"time"
)

func Login(c *gin.Context) {
	username := c.PostForm("username")
	password := c.PostForm("password")
	var user model.User
	redis_key := "user_error_" + username
	errCount, _ := cache.Rdb.Get(cache.Ctx, redis_key).Int()
	if errCount >= 3 {
		c.JSON(200, gin.H{
			"code": 500,
			"msg":  "密码错误三次,禁止登录",
		})
		return
	}
	if err := model.DB.Where("username = ?", username).First(&user).Error; err != nil {
		c.JSON(200, gin.H{
			"code": 500,
			"msg":  "查询用户失败",
		})
		return
	}
	if user.ID == 0 {
		c.JSON(200, gin.H{
			"code": 500,
			"msg":  "用户不存在",
		})
		return
	}
	if pkg5.Md5(user.Password) != pkg5.Md5(password) {
		cache.Rdb.Incr(cache.Ctx, redis_key)
		if errCount == 2 {
			cache.Rdb.Set(cache.Ctx, redis_key, 3, time.Hour*2)
			c.JSON(200, gin.H{
				"code": 500,
				"msg":  "密码错误3次,封禁2小时",
			})
			return
		}
		c.JSON(200, gin.H{
			"code": 500,
			"msg":  "密码错误",
		})
		return
	}
	c.JSON(200, gin.H{
		"code": 200,
		"msg":  "登录成功",
	})
}
func List(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	size, _ := strconv.Atoi(c.DefaultQuery("size", "3"))
	offset := (page - 1) * size
	var novel []model.Novel
	redis_key := "novels_list_page_" + strconv.Itoa(page)
	cacheData, _ := cache.Rdb.Get(cache.Ctx, redis_key).Result()
	if cacheData == "" {
		model.DB.Table("novels").
			Select("novels.id",
				"novels.title",
				"novels.content").
			Limit(size).
			Offset(offset).
			Find(&novel)
		jsonData, _ := json.Marshal(&novel)
		cache.Rdb.Set(cache.Ctx, redis_key, jsonData, time.Hour*2)
	} else {
		json.Unmarshal([]byte(cacheData), &novel)
	}
	c.JSON(200, gin.H{
		"code": 200,
		"msg":  "success",
		"data": novel,
	})
	return
}
func Detail(c *gin.Context) {
	id, _ := strconv.Atoi(c.Query("id"))
	var novel model.Novel
	redis_key := "novels_detail_" + strconv.Itoa(id)
	cacheData, _ := cache.Rdb.Get(cache.Ctx, redis_key).Result()
	if cacheData == "" {
		model.DB.Table("novels").
			Select("novels.id",
				"novels.title",
				"novels.content").
			Where("id = ?", id).
			Limit(1).
			Find(&novel)
		jsonData, _ := json.Marshal(&novel)
		cache.Rdb.Set(cache.Ctx, redis_key, jsonData, time.Hour*2)
	} else {
		json.Unmarshal([]byte(cacheData), &novel)
	}
	c.JSON(200, gin.H{
		"code": 200,
		"msg":  "success",
		"data": novel,
	})
	return
}
